Sorry long but don't want to drip feed
Ex sees ds 5 hrs on Sat. this is mutually agreed, a few weeks ago ds started saying fucking, it was said in the right context e.g when angry. I asked ds where he had heard this he said ex. no one else around ds swears so I decided to talk to ex about it who of course denies it.
DS came home this weekend very upset because he had heard ex say the naughty word and because his cousin who ex had taken him to visit had continually called ds a baby.
DS still upset today so I decided to mention it to ex I text him asking about the cousin and mentioned the swearing as usual he denied everything. Ex only likes to communicate through text, however during this "conversation" ds started trying to shout down the phone so ex says let him ring me which I did, there then followed a five minute argument between a grown man and 3 year old Ex continually denying swearing ds insisting he did. Eventually ex said ok if I swear you can tell me of, ds agrees, ex then says see you soon and daddy loves you to which ds shouts I don't love you, ex said that's nice and put phone down.
Part of me is now dreading what ex will do/say next and the other part is secretly glad ds said this, ex is not a nice/good dad.
I did not prompt ds at all.